🎟️ Sự kiện quyền

Notes on corporate actions from the system builder's side: cash and stock dividends, splits, rights issues and mergers — the one thing that changes a client's assets with no order placed. Why the ex-date sits exactly one session before the record date, why an announced event still gets amended, what happens to the fraction when a share entitlement is rounded down, and why a rights issue left to expire is real money lost.